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Environment Hazards & Kill Triggers

Environmental hazards are key elements that can inflict damage on the player or AI, adding a layer of complexity and challenge to your game. Frequently, these hazards also trigger visual or audio effects, providing crucial feedback to the player.

Add a Hazard to Your Map​

  1. Add a brush that is the size of your lava pit. Change the surface material to a lava material such as: ca_p/mp_env/mp_ca_sacrilegious_lava_plane.

    info

    This part isn't strictly required, but does provide an important visual cue to the player.

  2. Directly above that brush, add a kill trigger: New Entity → Triggers → Kill → Lava.

    tip

    If you want the kill trigger to kill AI as well as players, set the aiCanActivate flag in the Entity Inspector.

  3. Directly above the kill trigger, add a lava environment hazard: New Entity → envhazard → Volumes → Lava.

You should now have a delicious death sandwich (as shown below) made up of:

  • An environment hazard (A).
  • A kill trigger (B).
  • A brush with lava material (C).

add a hazard result

Anything that steps on the lava material brush will be killed by the kill trigger and will experience the lava effects from the environment hazard.